Stainless steel (SS) seamless pipes feature core specifications including standard grades like 304/304L and 316/316L, sizing from 1/8' to 24' Nominal Bore (NB), and compliance with global manufacturing standards such as ASTM A312, ASTM A213, and ASME SA312. Common Material Grades • SS 304 / 304L: Standard austenitic grade; great general corrosion resistance and formability. • SS 316 / 316L: Contains molybdenum for superior resistance to chlorides and marine environments. • SS 310 / 310S: High-temperature resistance grade for extreme heat applications. Dimensions and Sizing Standards • Nominal Size (NB): 1/8 inch up to 30 inches (larger sizes available on custom request). • Outer Diameter (OD): 6.00 mm to 610.00 mm. • Wall Thickness / Schedule: Designated by schedules like Sch 5S, 10S, 40S, 80S, and XXH. • Length: Standard lengths of 3 to 6 meters, or Single/Double Random Lengths (5 to 7 meters). Key Compliance Standards • ASTM A312 / ASME SA312: Standard specification for seamless and heavily cold worked austenitic stainless steel pipes. • ASTM A213 / ASME SA213: Seamless austenitic steel boiler, superheater, and heat-exchanger tubes. • ASTM A269: Standard specification for seamless and welded austenitic stainless steel tubing for general service. If you'd like, let me know:What grade or size (NB/OD) you needThe application or pressure requirementI can help you select the right schedule and ASTM specification. AI responses may include mistakes.